Coal-gas carburetor



Aug. 7, 11923.. nfmw@ H. SWARTZ COAL GAS CARBURETOR Original Filed Feb. 3, 1921 Patented Aug. 7, 1923.

HENRY SWARTZ, @E PHILADELPH, PENNSYLVAN @DAL-GAS CARBURETQR @rial application tiled February 3, 1921, Serial No. Mti. Divided and December i?, wat.

To 'whom it may concern:

Be it known that l, HENRY Swanrz, a citizen oi the United States, residin at Philadelphia, in the county of Phila elphia and State of Pennsylvania, have invented a certain new and useful improvement in Coal- Gas Carburetors, whereof the following is a speciiication, reference being had to the accompanying drawing.

My invention relates to devices designed to mia atmospheric air with the gaseous primary products of combustion from a coal iireto facilitate the complete combustion of such products and consequent economy of fuel. a

'.lhe form of my invention hereinafter de scribed is adapted as an accessory attacent for an ordinary house heatin furnace. However, it is to be understood t at it may be employed in conjunction with any type of furnace.

As hereinafter described; my' improved device includes a tubular air conduit having means to rigidly secure it in an opening en tending through the door or wall of a turnace; said conduit carryin at its inner end, a mining chamber with ali inlets and outlets and having, at its outer end, means adapted to adord a permanent air inlet port ot predetermined size and valvular means whereby additional air inlet ports may be opened and closed.

'lhis is a division of my application Serial No. 442,218 filed February 3, i921 for Letters Patent of the United States; the claims in that application being limited to the specic construction and arrangement of the parts of the device extending within the furnace chamber, whereas, the claims iii this case are limited to the specific details of construction and arrangement of the air inlet valvular means aforesaid..

My invention includes the various novel features of construction and arrangement hereinafter more definitely specified.

ln said drawin Fig. li is a plan view of a carburetor ein odying my invention.

Fig. .lll is an outer end elevation of said carburetor.

Fig. lll is a verticall sectional view of said carburetor taken on the line lill, lill in Fig. l.

Fig. lV is a transverse vertical sectional this application nie aerial No. teniet. a

view of the mixin chamber sho i and iii., g wn m Figs" ln said n g -1 is a tubular air conduit (nvenient y forni of a ieee of onequarter inch gas pipe) ttedp through the opening 2 in the door or wall 3 of a furnace inclosure, and carrying, at its inner end, the mixing chamber 5, which is rigidly connect ed wlth said conduit l by the screw thread t and Jam nut 7. Said chamber 5 is conveniently formed of a single casting of iron alloyed with silicon and man nese in such proportlons as to resist oxidation. Said chamber 5 overhangs the hre 8 as indica 1n lFig. lll, so as to come within the primary gaseous ,products of combustion 9 arising from sald nre. Said chamber 5 has at its bottom a series of nozzles 10 which as shown 1n Fig. lV have respective cylindrical vente il outwardly dared at their outer ends. Said chamber 5 also has a series oi vents ld at its inner edge and a series of vents entendlng obliquely upward with respect to said vents ll and it. l also dnd it convenient to provide said chamber 5 with the bafde plate or rib l? eatendin transversely in opposition to the inner en of the air inlet conduit i so as to distribute the incrim-1 ing air throughout said chamber 5.

lt 1s to be understood that the heat oi the nre 8 causes circulation of air through said vents il, it and 15, inducing the How of air inwardly through said conduit l. l prefer to provide said conduit with the inlet port 19, (conveniently formed by drilling said conduit i) so as to draw back into the turnace any unconsumed gaseous products from said lire 8 which otherwise might tend to escape at the crevioes around the door 3, and return the same through the vents at'ore said. However, l provide for a 'continuous supply of fresh air from the outer atmosphere, as follows:

lprovide the outer end ot said conduit l with the valve casing 2l which is engaged therewith by the screw thread 22; said conduit l and casing 21 being rigidly connected with said door or wall 3 by the jam nut 23. Said casing 2l is conveniently termed of cast metal havingl the cross bar 25 with the central screw bearing 26 in coaxial relation with said conduit i, to receive the screw 27 as a pivot Jfor the rotary cap vve lill through said manually.

28 which is jammed in said bearingl so tightly as not to be accidently displace fromits normal position shown in Fig. III. Said valve 28 is provided with a permanent air inlet port 30, of such size as is predetermined to be best suited for the type of furnace in connection with which the carburetor is used; said port being simply a hole drilled ivot screw 27.

However, also prefer to provide said valve plate 28 with auxiliary ports 32, as shown in Fig.v II, which are closed whan said valve is in the position indicated 1n the drawing but which may b e partially or entirely opened by turmng said valve upon its pivot screw 27, and the lugs 34 are p rovided to conveniently effect such rotation It may be observed that said ports 32 are of such size that they may used to check the fire 8 by a su ply of air 1n excess of that re uired to e 'ect complete combustion of sai primary gaseous products 9.

I lind it convenient to lnnit the. rotary movementof said valve 28 by casting the rib 33 upon its inner face, in such-position that the opposite ends of said rib encounter said cross bar at the respectively opposite limits of its range of movement.

However, it is to be understood that I do not desire to limit myself to the precise detials of construction and arrangement therein set forth, as it is obvious that various modifications ma be made therein without departing from t e essential features of my invention, as defined in the appended claims.

I claim:

1. In a coal as carburetor; the combination with a tugular air conduit having an external screw thread at each end thereof, and an aperture intermediate of its ends, adapted to communicate with the interior of a furnace inclosnre; of means arranged to rigidly connect said conduit with an opening in a furnace inclosure including a jam nut; a mixing chamber at the inner end of said conduit of larger cross sectional area than said conduit; a valve casing having a screw thread connecting it with the outer end of said conduit, and having a cross bar with an axial screw bearing in coaxial relation with said conduit; a rotary valve having an axial bearing in coaxial relation with said cross bar bearing; a pivot screw extending in said bearings and having a head exterior to said valve, adapted to retain the latter in cooperative relation with said casing; means arranged to continually admit a predetermined air supply, including a port extending through said pivot screwk from the outer atmosphere into said valve casing; said valve having auxiliary ports adapted to be closed by said cross bar, in one position of rotation with respect to said valve casing and V to be opened more or less in accordance with 4the position of rotation of said valve; and means arranged t'o limit the rotary movement of said valve, including a rib projecting from the inner face thereof, arranged to encounter said cross bar.

2. In a coal as carburetor; the combination with a tiiliular air conduit having a screw thread at each end thereof; of means arranged to rigidly connect said conduit with an opening in a furnace inclosure; a mixing chamber at the inner end of said conduit; a valve casing having a screw thread connecting it with the outer end of said conduit, and having a cross bar with an axial screw bearing in coaxial relation with said conduit; a rotary valve having an axial bearing in coaxial relation with said cross bar bearing; a pivot screw extending in said bearings and having a head exterior to said valve, adapted to retain the latter in cooperative relation with said casing; means arranged to continually admit a predetermined air supply, includin a port extending through said pivot screw rom the outer atmosphere into said valve casing; said valve having auxiliary ports adapted to be closed by said cross bar, in one position of rotation with respect to said valve casing and to be opened more or less in accordance with the position of rotation of said valve; and means arranged to limit the rotary movement of said valve, including a rib projecting from the inner face thereof, arranged to encounter said cross bar.

3. In a coal gas carburetor; the combination with a tubular air conduit; of means arranged to rigidly connect said conduit with an opening 1n a furnace inclosnre; a valve casing having means connecting it with the outer end of said conduit, and having a cross bar with an axial bearing in coaxial relation with said conduit; a rotary valve having an axial bearing in coaxial relation with said cross bar bearing; a pivot extending in said bearings and having a head exterior to said valve, adapted to retain the latter in cooperative relationv with said casing; means arranged to continually admit a predetermined air supply, including a port extending through said pivot from the outer atmosphere into said valve casing; said valve having an auxiliary port adapted to be closed by said cross bar, in one position of rotation with respect to said valve casing and to be opened more or less in accordance with the position of rotation of said valve.

4. In a coal gas carburetor; the combination `with a tubular air conduit; of means arranged t0 rigidly connect said conduit with an opening in a furnace inclosnre; a valve casing having means connecting it with the outer end of said conduit, and havinga cross bar; a rotary valve having an axial pivotal connection with said cross bar; means arranged to continually admit a premenne@ oleeimine oinevippl inoiuding o pona' onsending through enioiynxioi pivotal connec ion from @he onlie? nibmospheve inao eni volvo casing.; seid valve having en auxiliary pom adopted fno he closed by Seidl ei'oee hon, in one poeioion o1? ioohion vvihh respect Glo sind volvo casing and ho he opened more or lees in oeooi'oonoe vvizh the poeivion or foto (sion of soio volvo.

5. 1in n coni gos cni'hni'etor; the oonrihinnl tion with o tubular oir conduit; of moons oniongeo to dehochohly connectl soidl conduit!l vvii'h on opening in o face incloure; n volvo oosing having moons connecting iv with the outer end of sold oonduin; o, roomy vnllve having on exioi homing in ooonini relation vvihh enil eoeing; and moon@ wronged. fio eonvinnoily nl@ o, predetermined on snp@ ply? 'including .o pom; amending ibhvongh emol omini heaving from the onhev atmosphere into @nid volvo owing; smid volvo hnving on nun iiinry poni; adopted fio he opened move on ieee in nooondonee vvivh @he position ofi rohafion of soici volvo.

In iteszimony whereof, have heiieunco signed my nome o; Philadelphia, Fey venin, this omvteenoh doy of Decemhei,

mi. l

HENRY SWARTZ. Witnesses:

Roon Menoome9 Cnnonviv E, R. 

